28516188 has 48 divisors (see below), whose sum is σ = 70528640. Its totient is φ = 8942400.

The previous prime is 28516153. The next prime is 28516217. The reversal of 28516188 is 88161582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40923 + ... + 41613.

Almost surely, 2^28516188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28516188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35264320).

28516188 is an abundant number, since it is smaller than the sum of its proper divisors (42012452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28516188 is a wasteful number, since it uses less digits than its factorization.

28516188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898 (or 896 counting only the distinct ones).

The product of its digits is 30720, while the sum is 39.

The square root of 28516188 is about 5340.0550558960. The cubic root of 28516188 is about 305.5135592211.

The spelling of 28516188 in words is "twenty-eight million, five hundred sixteen thousand, one hundred eighty-eight".